I just finished assembling my unit yesterday, so I can't speak to battery tests. ( A thanks to everyone who has written about their experiences, and a big thanks to Frederic for Papywizard!)
I was thinking of exploring the use of those rechargeable batteries used in cordless drills. They come in 9v or 12V and are relatively compact. My local recycle centre often has them for a couple of dollars. If they worked, it might be worth buying a new one.
My Nokia 770 came with a 12V car charger. I wonder if I could adapt it to run off of the Orion power out. It could be handy for emergencies.
Yes, bluetooth uses a lot of current. Shutting it down is a good idea. As well as turning off the display (using the power button followed by the square button.
OK - thanks for the tips.
But that implies that it would be good to turn off the BT-RS232-TTL combo device interfacing with the Merlin head too? Currently there is only one way to do this - physically disconnect the RJ11 cable or turn off the whole head - would you advocate doing this too?
Andrew Stephens Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm lenses, Nodal Ninja 5 Lite, Nodal Ninja 4 with R-D16, Agno's MrotatorTCS short. Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket, Agno's MrotatorA. Merlin/Orion robotic pano head + Papywizard on Nokia 770/N800/N810 and Windows 8/XP/2K.